#18557B#18557B
#18557B is a dark, moderate cyan. Relative luminance 0.081; OKLCH L 43.0% C 0.087 H 241.0°. Best body text is #FFFFFF at 8.00:1 contrast (WCAG AA passes).
Color values
| HEX | #18557B |
|---|---|
| RGB | rgb(24, 85, 123) |
| HSL | hsl(203, 67%, 29%) |
| HSV | hsv(203, 80%, 48%) |
| CMYK | cmyk(80.5%, 30.9%, 0%, 51.8%) |
| CIE-LAB | lab(34.23, -4.97, -26.94) |
| CIE-LCH | lch(34.23, 27.39, 259.55°) |
| OKLab | oklab(43.04% -0.0422 -0.0763) |
| OKLCH | oklch(43.04% 0.087 241) |
| XYZ | xyz(7.1989, 8.1204, 19.9230) |
| Luminance | 0.0812 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Deep Sea Blue
#015482
ΔE00 1.63
Light Navy
#155084
ΔE00 3.83
Light Navy Blue
#2E5A88
ΔE00 4.38
Dusk Blue
#26538D
ΔE00 5.47
Dark Slate Blue
#214761
ΔE00 5.58
Ugly Blue
#31668A
ΔE00 6.00
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#18557B #7B3E18
analogous
#187B70 #18557B #18247B
triadic
#18557B #7B1855 #557B18
tetradic
#18557B #70187B #7B3E18 #247B18
square
#18557B #70187B #7B3E18 #247B18
split-complementary
#18557B #7B1824 #7B7018
monochromatic
#05121A #0E3248 #18557B #2278AE #369AD8
Accessibility & contrast
On white
8.00
#18557B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.62
#18557B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #18557B
8.00:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##18557B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##18557B | 1.00 | 8.00 | 2.62 | 8.00 |
| #FFFFFF | 8.00 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.62 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.00 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#43567D
Deuteranopia (green-blind)
#364C7A
Tritanopia (blue-blind)
#005E62
Achromatopsia (no color)
#505050
Design tokens & code
CSS
--color: #18557b; /* rgb */ color: rgb(24, 85, 123); /* oklch */ color: oklch(43.0% 0.087 241.0);
Tailwind
colors: {
custom: {
50: '#6584a1',
500: '#18557b',
950: '#000000',
},
}SCSS
$custom: #18557b; $custom-light: #6584a1; $custom-dark: #000000;
JSON
{
"hex": "#18557b",
"rgb": {
"r": 24,
"g": 85,
"b": 123
},
"hsl": {
"h": 203.03,
"s": 67.347,
"l": 28.824
},
"oklch": {
"l": 0.43043,
"c": 0.0872,
"h": 241
},
"luminance": 0.08121
}Semantic roles & 50–950 ramp
primary
#18557B
secondary
#B06A3F
accent
#803EEA
background
#F6F8F9
surface
#EBEFF2
border
#C6CACC
text
#060B0F
muted
#7A7C7E